You probably remember programs like SeTool or A2uploader? Free, fast and handy...

I present to you today S1Tool, another child of man named the_laser supporting all Xperia smartphones of the years 2010 to 2011 In this tutorial I will show you what such a small program can do and how to use it.

1. Run s1tool.exe.
2. Click IDENTIFY.
3. Plug turned off phone with pressed 'back' or 'volume down' key.
4. In the left window you will see various information about the phone.

Flashing

1. Run s1tool.exe.
2. Click FLASH.
3a. Choose firmware (.ftf or two files: APPSW and FSP).
3b. If you do not want to loose your data, extract and open FSP file and delete the file containing the name 'userdata'.
4. Plug turned off phone with pressed 'back' or 'volume down' key.
5. After the flashing is done you will see a message in the left window, you can unplug your phone.

Relocking bootloader

Warning, use only with the unlocked bootloader!

1. Run s1tool.exe.
2. Click RESTORE.
3. Plug turned off phone with pressed 'back' or 'volume down' key.
4. After a while, the bootloader will be locked.